How will it affect the device when static electricity is applied to the logic pins? And how to deal with the issue?

Generally, the oxide film used in input pins for motor drivers is very thin (few nano meter level), therefore when a static electricity of few hundred to few thousand volts is applied, the device will be damaged or destroyed.

Our devices have integrated surge protection circuits/elements for each input pins, but it does not guarantee that the device will not be damaged under any circumstances. Please avoid static electricity to be applied to the device directly.

When handling semiconductor products, be sure that the environment is protected against static electricity. Operators should wear anti-static clothing, anti-static shoes, and a wrist strap. In addition, containers and other objects that come in direct contact with semiconductor products should be made of materials that do not produce static electricity that would cause damage.

Control anti-static equipment at all times to ensure that it works correctly. Take utmost care when handling semiconductor devices with ESD warning labels.